CN1674781A - Flower thinning agent - Google Patents

Abstract

The flower thinning agent of the present invention comprises a preparation of a mixture of an inorganic compound of poor water solubility with an additive, satisfying the following relationships of (a) 0.03<=P<=30, (b) 3<=Q<=800, and (c) 0.5<=Q/P<=1000, wherein P: average particle diameter (mum) measured by SALD-2000A laser type particle size distribution meter, Q: BET specific surface area (m<SUP>2</SUP>/g) measured according to the nitrogen adsorption method. The flower thinning agent of the present invention is not harmful to a human body and has not only high adaptability to the deflection of spread timing, but also high flower thinning effect.

Description

flower thinning agent

technical field

The present invention relates to a flower thinning agent, more specifically, to such a flower thinning agent, which has no adverse effects on the environment, has little worry about phytotoxicity, and is not easily affected by regions and climates. The agent can be used for apples, pears, peaches, grapes, persimmons, etc.

Background technique

In the work of fruit tree cultivation farms, the work of thinning buds, flowers and fruits to control the number of fruits, and picking leaves to make the fruits evenly colored has become a very heavy burden. For Apple, for example, these jobs account for about half of the total job workload. Among them, bud thinning, flower thinning, and fruit thinning operations are important operations that have a great impact on fruit quality, but since this operation must be completed within a specified short time, the burden on fruit farmers is heavy, and especially in Japan, There is also the problem of the aging of the agricultural population, and labor saving has become a major issue. This bud thinning, flower thinning, and fruit thinning is necessary not only for apples, but also for pears, peaches, grapes, persimmons, citrus fruits, etc. By performing this work, the number of fruits is limited, and the fullness of fruits and the flourishing of branches and leaves are promoted. Wherein, except that flower thinning is a manual method, the method of spreading flower thinning agent has always been adopted in the past.

As a flower thinning agent proposed and put into practical use so far, there is, for example, a flower thinning agent containing lime sulfur mixture as an active ingredient. However, although the lime-sulfur mixture has a certain effect, because it is strongly alkaline and has a strong foul smell, it may have adverse effects on the human body. Therefore, protective measures such as wearing a mask, protective glasses, and protective clothing must be taken. Workability is poor, and there are problems in operation. In addition, lime sulfur mixture will also corrode the metal of the spreader because it is strongly alkaline. In order to improve this phenomenon, in the case of reducing the amount of lime so that the pH value is close to the neutral region, due to the increase in the amount of sulfur, the phenomenon of phytotoxicity such as leaf browning will increase sharply. Therefore, the method of adjusting the pH is not a good method. Furthermore, when calcium-lime-sulfur mixture is used, the characteristic odor of sulfur brought by insects such as bees when picking flowers is likely to cause a decrease in the quality of honey, which has become a problem in particular in recent years. Therefore, although the use of lime-sulfur mixture is considered to have a certain flower thinning effect, it is difficult to say that it is a good flower thinning agent in terms of side effects.

In addition, in Japanese Patent Application Publication No. 2000-290103, Japanese Patent Application Publication No. 2001-206804, and Japanese Patent Application Publication No. 2001-206805, it is proposed to use organic water-soluble acids such as citric acid, gluconic acid, succinic acid, and lactic acid , fumaric acid, malic acid, acetic acid, tartaric acid, propionic acid and other organic acids and organic acid salts as active ingredients flower thinning agent. However, in the case of using the above-mentioned organic acids and organic acid salts, although a certain flower thinning effect can be seen as long as they are spread within 1 to several hours after flowering, the flower thinning agent is used under natural conditions, so it is subject to Due to the influence of regional differences, changes in climate and temperature, it is extremely difficult to achieve the desired regular spraying, and when the spraying time changes, the effect is significantly reduced. Therefore, it is difficult to improve the flower thinning effect stably. This is its disadvantage. .

Furthermore, JP-A-2000-198704 and JP-A-2001-328910 propose flower thinning agents containing aliphatic organic acids such as itaconic acid as active ingredients. However, in the case of using an agent containing an aliphatic organic acid such as itaconic acid as an active ingredient, although there is a certain flower thinning effect, there is a phenomenon of curling or temporarily drooping upward growth (epinastei) of leaves and leaves. The problem of phytotoxicity such as browning, therefore can not be said to be a good method.

Moreover, since the above-mentioned substances are completely water-soluble substances, the flower thinning agent is easy to be lost, and there is a problem that the flower thinning effect is hardly seen when the time suitable for spreading is rainy.

In addition, JP-A-55-13233 and JP-A-58-157706 propose flower thinning agents containing lecithin, phytosterol, and the like as active ingredients. However, when lecithin or the like is used alone, although a certain flower thinning effect can be observed, it is difficult to obtain a sufficient flower thinning effect because the persistence of the effect is insufficient. The reason for this is considered as follows. That is, since trees grow under natural conditions, there is a phenomenon that the tree growth momentum is different between the whole tree as a unit and the branch as a unit. Therefore, in the flowering period, it is difficult to make the flowering period completely on time. Therefore, although the effect can be seen on a specific branch, the effect is often not seen on other branches. As a result, it can be inferred that it is difficult to obtain a sufficient flower thinning effect when the entire treatment area is averaged. Moreover, in order to make up for the deficiency of the flower thinning effect and increase the spraying concentration, phytotoxicity such as leaf browning often occurs, so it is not good. Furthermore, when the substance is dissolved in water, etc., the flower thinning agent is easy to run off, Therefore, when the time suitable for spreading is rainy, there is a problem that the flower thinning effect is hardly seen.

In view of such actual situation, the inventors of the present invention provide a flower thinning agent which can solve the above-mentioned problems, is safe to the human body, has high adaptability to fluctuations in spreading time, and has a high flower thinning effect.

Contents of the invention

The content of claim 1 of the present invention is that a flower thinning agent is composed of a mixed preparation of a water-insoluble inorganic compound and an additive, and is characterized in that it satisfies the conditions of the following (a), (b) and (c) :

(a) 0.03≤P≤30

(b) 3≤Q≤800

(c) 0.5≤Q/P≤1000

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area (m ² /g) measured by nitrogen adsorption method.

The content of claim 2 of the present invention is that a flower thinning agent is composed of a mixed preparation of a water-insoluble inorganic compound and an additive, and is characterized in that it satisfies the following conditions of (d), (e) and (f):

(d) 0.03≤P≤10

(e) 7≤Q≤300

(f)0.5≤Q/P≤300

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area (m ² /g) measured by nitrogen adsorption method.

The content of claim 3 of the present invention is that a flower thinning agent is composed of a mixed preparation of a water-insoluble inorganic compound and an additive, and is characterized in that it satisfies the following conditions (g), (h) and (i):

(g)0.03≤P≤5

(h) 10≤Q≤200

(i) 1≤Q/P≤150

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area (m ² /g) measured by nitrogen adsorption method.

The content of claim 4 of the present invention is that the flower thinning agent described in any one of claims 1 to 3 is composed of a mixed preparation of a water-insoluble inorganic compound and an additive, and is characterized in that it satisfies the following (j) , (k) and (l) conditions:

(j)0.5≤Dys≤10

(k)0.002≤Dxs≤10

(l) 0.5≤Dys/Dxs≤300

Dys: In the mercury intrusion method, the point at which the increase in mercury intrusion (Log Differential intrusion) reaches the maximum value (ml/g)

Dxs: Average pore diameter of Dys

Dys/Dxs is the amount of average pore diameter.

The content of claim 5 of the present invention is that the flower thinning agent described in any one of claims 1 to 4, wherein the water insoluble inorganic compound is selected from silicate minerals, calcium carbonate, zeolite, magnesium carbonate, magnesium phosphate at least one of the selected.

The content of claim 6 of the present invention is that the flower thinning agent described in any one of claims 1 to 4, wherein the poorly water-soluble inorganic compound is at least one selected from silicate minerals, zeolites, and magnesium phosphate. kind.

The content of claim 7 of the present invention is that a flower thinning agent is composed of a mixed preparation of a water-insoluble inorganic compound composed of calcium phosphate and an additive, and is characterized in that it satisfies the following (a), (e), ( Conditions for m) and (n):

(a) 0.03≤P≤30

(e) 3≤Q≤300

(m)0.01≤R≤30

(n)0.5≤S≤300

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area measured by nitrogen adsorption method (m ² /g)

R: Average particle diameter (μm) of particles measured by electron microscope photography

S: porosity

S=BET specific surface area Q (m ² /g) measured by nitrogen adsorption method/specific surface area Q1 (m ² /g) calculated from average particle diameter R of particles measured by electron microscopy.

The content of claim 8 of the present invention is that a flower thinning agent is composed of a mixed preparation of a poorly water-soluble inorganic compound composed of calcium phosphate and an additive, and is characterized in that it satisfies the following (a), (e), (o ) and (t) conditions:

(a) 0.03≤P≤30

(e) 3≤Q≤300

(o)0.01≤R≤10

(t)0.5≤S≤100

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area measured by nitrogen adsorption method (m ² /g)

R: Average particle diameter (μm) of particles measured by electron microscope photography

S: porosity

S = BET specific surface area Q (m ² /g) measured by nitrogen adsorption method / specific surface area Q1 (m ² /g) calculated from average particle diameter R of particles measured by electron microscope photography.

The content of claim 9 of the present invention is that a flower thinning agent is composed of a mixed preparation of a poorly water-soluble inorganic compound composed of calcium phosphate and an additive, and is characterized in that it satisfies the following (a), (e), (u ) and (v) conditions:

(a) 0.03≤P≤30

(e) 3≤Q≤300

(u)0.01≤R≤5

(v)0.5≤S≤10

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area measured by nitrogen adsorption method (m ² /g)

R: Average particle diameter (μm) of particles measured by electron microscope photography

S: porosity

S=BET specific surface area Q (m ² /g) measured by nitrogen adsorption method/specific surface area Q1 (m ² /g) calculated from average particle diameter R of particles measured by electron microscopy.

The content of claim 10 of the present invention is that the flower thinning agent described in any one of claims 1 to 9, wherein the additive is selected from condensed phosphoric acid and its salt, lecithin, sterol, amino acid, sucrose fatty acid ester out at least one.

According to claim 11 of the present invention, the flower thinning agent according to any one of claims 1 to 10, wherein the additive is used in an amount of 0.005 to 200 parts by weight relative to 100 parts by weight of the poorly water-soluble inorganic compound.

Best way to practice the invention

The poorly water-soluble inorganic compound used in the present invention is not particularly limited as long as it is a poorly water-soluble inorganic compound that satisfies the conditions of (a), (b) and (c) above when it is made into a mixed preparation together with additives. Limitations include, for example, calcium carbonate, calcium phosphate, magnesium carbonate, magnesium phosphate, barium sulfate, silicate compounds, zeolites, and the like, and these may be used alone or in combination of two or more.

Among them, calcium phosphate, magnesium carbonate, magnesium phosphate, silicate minerals, and zeolite are preferable because they are easy to produce a substance with moderate porosity and moderate dispersibility, and calcium phosphate, magnesium phosphate, and silicate are more preferable. Minerals, zeolites, among which calcium phosphate is particularly preferred.

In addition, the porosity of calcium phosphate is the specific surface area Q1 (m 2 /g) calculated from the BET specific surface area Q(m ² /g) measured by the nitrogen adsorption method ^/ the average particle diameter R of the particles measured by the electron microscope. g) Calculated, preferably adjusted to have a moderate porosity, so that the flower thinning agent is released at a certain concentration within a certain time.

As calcium phosphate in the present invention, for example, amorphous calcium phosphate (abbreviation: ACP, chemical formula: Ca ₃ (PO ₄ ) ₂ nH ₂ O), fluorinated apatite (abbreviation: FAP, Ca ₁₀ (PO ₄ ) ₆ F ₂ ), chloride apatite (abbreviation: CAP, Ca ₁₀ (PO ₄ ) ₆ Cl ₂ ), hydroxyapatite (abbreviation: HAP, Ca ₁₀ (PO ₄ ) ₆ OH ₂ ), octaphosphate Calcium (abbreviation: OCP, Ca ₈ H ₂ (PO ₄ ) ₆ 5H ₂ O), tricalcium phosphate (abbreviation: TCP, Ca ₃ (PO ₄ ) ₂ ), etc., which can be used alone or in combination of two or more Used in combination, a mixed composition of calcium carbonate and calcium phosphate can also be used. The synthesis of the mixed composition of calcium carbonate and calcium phosphate can be prepared according to the method of Japanese Patent Application Hei 7-196144 or the like.

Among them, from the viewpoint of moderate size, porosity, and dispersibility, amorphous calcium phosphate, tricalcium phosphate, hydroxyapatite, a mixture of calcium phosphate and calcium carbonate are preferred, and amorphous calcium phosphate is most preferred. These can be produced according to the methods described in WO97-3016, WO03-17786, WO03-32752 and the like.

Examples of reaction conditions are shown below, but the present invention is not limited to them.

(combination condition 1)

①Dilute aqueous solution of phosphoric acid: 1 to 50% by weight

②Amount of phosphoric acid added: 1 to 70% by weight (to CaCO ₃ )

③ Peripheral speed of the mixing paddle: 0.5m/s or more

④Mixing time: 0.1 to 150 hours

⑤Temperature of water suspension in mixed system: 0～80℃

⑥ pH of the mixed system: 5-9

(curing condition 1)

① Peripheral speed of the maturing paddle: 0.5m/s or more

② Curing time: 0.1 to 100 hours

③Temperature of water suspension in aging system: 20～80℃

④The water suspension pH of the aging system: 6~9

In the above-mentioned reaction conditions, in order to reduce the average particle diameter (μm) of the particle that uses SALD-2000A laser type particle size distribution meter to record, can reach by improving the peripheral velocity of mixing paddle, or prolong mixing time; And in order to reduce The BET specific surface area (m ² /g) measured by the nitrogen adsorption method can be achieved by reducing the amount of phosphoric acid added. In addition, in order to reduce the particle size measured by the electron microscope or increase the porosity, it can be achieved by strengthening the stirring conditions during the reaction.

(combination condition 2)

Water is mixed with calcium hydroxide and an organic acid having a carboxyl group to form a precursor substance, to which a phosphoric acid source and an alkali metal source are added.

In addition, the preferable molar ratio of each component at the time of preparation is as follows.

Multivalent metal ions: organic acid ions with carboxyl groups = 0.8:1 to 200:1

Organic acid ion with carboxyl group: phosphate ion = 1:0.6～1:140

Organic acid ion with carboxyl group: alkali metal ion = 1:0.01～1:8

(curing condition 2)

Aqueous suspension temperature of aging system: 80～230℃

Curing time: 0.5 to 48 hours

In addition, in the above reaction conditions, in order to reduce the average particle diameter (μm) of the particles measured by the SALD-2000A laser particle size distribution meter, or to reduce the BET specific surface area (m ² /g) measured by the nitrogen adsorption method , just increase the curing temperature or prolong the curing time.

In addition, even if the addition amount of the alkali metal source is increased, the BET specific surface area (m ² /g) measured by the nitrogen adsorption method can be reduced.

Examples of calcium carbonate in the present invention include heavy calcium carbonate, light calcium carbonate, colloidal calcium carbonate, and porous calcium carbonate. These calcium carbonates may be used alone or in combination of two or more. Colloidal calcium carbonate and porous calcium carbonate are preferable in view of moderate size and dispersibility, and porous calcium carbonate is more preferable in view of moderate porosity. It should be noted that the above-mentioned preferred calcium carbonate can be prepared according to the method described in Japanese Patent No. 3058255 and the like.

Examples of reaction conditions are shown below, but the present invention is not limited to them.

(Reaction conditions)

Lime milk concentration: 3.5 to 10.2% by weight

Complex forming substance: 0.005 to 15% by weight

Carbon dioxide flow rate: 2000～20000L/H

Gas concentration: 10~100%

(curing conditions)

Calcium carbonate concentration: 2.4 to 13.0% by weight

Curing time: 24 to 240 hours

In addition, in the above reaction conditions, in order to reduce the average particle diameter (μm) of the particles measured with the SALD-2000A laser particle size distribution meter, it can be achieved by reducing the concentration during compounding and aging, or prolonging the aging time. In addition, in order to increase the BET specific surface area (m ² /g) measured by the nitrogen adsorption method, it can be achieved by increasing the amount of complex-forming substances added.

Examples of the silicate compound of the present invention include crystalline silica, hydrous silicic acid, wet silica, dry silica, alkali metal salts such as sodium silicate or potassium silicate, calcium silicate or Alkaline earth metal salts such as magnesium silicate, these metal salts may be used alone or in combination of two or more, and wet silica is preferred in view of having an appropriate size and dispersibility.

Examples of magnesium phosphate in the present invention include monomagnesium phosphate, dimagnesium phosphate, trimagnesium phosphate, and magnesium pyrophosphate. These magnesium phosphates may be used alone or in combination, but from the viewpoint of having an appropriate size and dispersibility Considering that trimagnesium phosphate is preferred.

Examples of the zeolite in the present invention include synthetic zeolites and natural zeolites. These zeolites may be used alone or in combination. However, synthetic zeolites are preferred because they have appropriate size and dispersibility.

As magnesium carbonate of the present invention, can enumerate basic magnesium carbonate, heavy magnesium carbonate, light magnesium carbonate etc., these magnesium carbonates can be used alone, also can use in combination, also can use the mixture of calcium carbonate and magnesium carbonate, also can use That said, even dolomite doesn't matter. Among them, light magnesium carbonate is preferable from the viewpoint of having an appropriate size and dispersibility.

The flower thinning agent of the present invention has an average particle diameter P measured using a particle size distribution meter as long as it satisfies the condition of (a) below, but preferably satisfies the condition of (d), and more preferably satisfies the condition of (g).

(a) 0.03≤P≤30

(d) 0.03≤P≤10

(g)0.03≤P≤5

When the average particle diameter P is larger than 30 μm, the adsorption of the additive added to the poorly water-soluble inorganic compound is not sufficient, so not only the persistence of the effect of the flower thinning agent is insufficient, but also phytotoxicity is likely to occur. On the other hand, the lower limit of the average particle diameter P is not particularly limited, but it is generally technically difficult to synthesize a poorly water-soluble inorganic compound that can maintain a dispersed state of less than 0.03 μm.

In addition, when the particle size of the poorly water-soluble inorganic compound is fine, since the particle size of general pollen is about 20 to 50 μm, the poorly water-soluble inorganic compound that is finer than the particle size of the pollen physically wraps the pistil or stamen of the pollen. Covering, thereby having the effect of preventing pollination, particularly preferably a fine water-insoluble inorganic compound.

It should be noted that in the present invention, the average particle diameter P of the particle size distribution is calculated from the average particle diameter (μm) of the particles measured using a SALD-2000A laser particle size distribution meter. The measurement sample was diluted with distilled water so that the concentration of the flower thinning agent became 5% by weight, using an ultrasonic disperser US-300T (manufactured by Nippon Seiki Seisakusho), pre-dispersed for 1 minute under the conditions of 20KHZ and 300W, and then To measure.

As long as the specific surface area Q of the flower thinning agent of the present invention satisfies the condition of the following (b), it preferably satisfies the condition of (e), more preferably satisfies the condition of (h), and the most preferred range is 25≤Q≤200 .

(b) 3≤Q≤800

(e) 7≤Q≤300

(h) 10≤Q≤200

When the specific surface area Q is larger than 800 m ² /g, since the specific surface area is too high, the release rate of the additive added to the poorly water-soluble inorganic compound becomes too slow, and the additive in the mixed preparation cannot be released in a sufficient amount. Inhibits pollination of flowers during the pollination period, thus making the flower thinning effect insufficient. On the other hand, when the specific surface area is less than 3 m ² /g, since the adsorption area of the additive becomes smaller, not only the flower thinning effect is not sustainable enough, but also the phytotoxicity is likely to occur.

In addition, in the present invention, the measurement of the specific surface area Q was performed using NOVA2000 manufactured by Uasionix Co., Ltd. The measurement sample used such a sample: dilute with distilled water so that the concentration of the flower thinning agent becomes 5% by weight, and use an ultrasonic disperser US-300T (manufactured by Nippon Seiki Seisakusho) for 1 minute under the conditions of 20KHZ and 300W. After the predispersion, dry at 350°C for 3 hours, and pass the sample obtained through a 60-mesh sieve.

The Q/P value of the flower thinning agent of the present invention may satisfy the condition of (c) below, but preferably satisfies the condition of (f), and more preferably satisfies the condition of (i).

(c) 0.5≤Q/P≤1000

(f)0.5≤Q/P≤300

(i) 1≤Q/P≤150

When the Q/P value exceeds 1000, since the additive added to the poorly water-soluble inorganic compound hardly exhibits the sustained-release effect, the flower thinning effect is not sufficient in the case of fluctuating weather. On the other hand, when the Q/P value is less than 0.5, not only the adsorption area of the additive becomes too small and the persistence of the effect becomes insufficient, but also the phytotoxicity tends to occur.

In the flower thinning agent of the present invention, in the mercury intrusion method, the point (ml/g) Dys at which the mercury intrusion increase (LogDifferential Intrusion) reaches the maximum value preferably satisfies the condition of (j) 0.5≤Dys≤10, more preferably satisfies The condition of 0.5≤Dys≤8 is more preferably satisfied with the condition of 0.5≤Dys≤7. When the point (ml/g) at which the increase in mercury intrusion (Log Differential Intrusion) reaches the maximum value (ml/g) Dys is less than 0.5, the adsorption of additives is insufficient, and the flower thinning effect is often insufficient, so it is not good. On the other hand, when Dys is larger than 10, the adsorption is too strong and a sufficient flower thinning effect may not be exerted, which is also not preferable.

The flower thinning agent of the present invention preferably satisfies the condition of (k) 0.002≤Dxs≤10 as Dxs of the average pore diameter of Dys, more preferably satisfies the condition of 0.003≤Dxs≤3, further preferably satisfies the condition of 0.005≤Dxs≤1 . When Dxs is less than 0.002, the sustained release rate of the additive added to the poorly water-soluble inorganic compound becomes too slow, and the flower thinning effect becomes insufficient, which is not preferable. On the other hand, if it exceeds 10, sufficient flower thinning effect cannot be exhibited, and phytotoxicity is likely to occur, which is also not preferable.

It should be noted that, in the mercury intrusion method, the point (ml/g) Dys at which the increase in mercury intrusion (Log Differential Intrusion) reaches the maximum value and the average pore diameter Dxs are the mercury intrusion type 9520 manufactured by Shimadzu Corporation. Injection device (Porosimeter) was used for measurement, and the measurement conditions were as follows.

Mercury purity 99.99%

The surface tension of mercury is 484 dynes/cm

Mercury contact angle 130°C

Determination cell (cell) constant 10.79μl/pF

Sample weight 0.1～0.5g

The measurement sample uses such a sample: dilute with distilled water so that the concentration of the flower thinning agent reaches 5% by weight, and use an ultrasonic disperser US-300T (manufactured by Nippon Seiki Seisakusho) for 1 minute under the conditions of 20KHZ and 300W After the predispersion, dry at 350°C for 3 hours, and pass the sample obtained through a 60-mesh sieve.

In the flower thinning agent of the present invention, the amount Dys/Dxs of the average pore diameter preferably satisfies the condition of (1) 0.5≤Dys/Dxs≤300, more preferably satisfies the condition of 1.0≤Dys/Dxs≤150, further preferably satisfies 3.0≤Dys /Dxs≤130 conditions. When Dys/Dxs is less than 0.5, the carrying effect is small, and the sustained flower thinning effect is often not obtained, which is not good. On the other hand, when it exceeds 300, the adsorption to the poorly water-soluble inorganic compound becomes too strong, and the desired flower thinning effect may not be obtained, which is also not preferable.

In the present invention, the average particle size R (μm) measured by an electron microscope for the flower thinning agent composed of calcium phosphate to the water-insoluble inorganic compound, as long as it satisfies the following (m) condition, but more preferably satisfies ( The condition of o) is further preferably satisfied with the condition of (u).

(m)0.01≤R≤30

(o)0.01≤R≤10

(u)0.01≤R≤5

When the average particle diameter R measured by an electron microscope is larger than 30 μm, the adsorption of the additive added to the poorly water-soluble inorganic compound is insufficient, so that not only the persistence of the effect becomes insufficient, but also phytotoxicity tends to occur. On the other hand, when the average particle diameter R measured with an electron microscope is less than 0.01 μm, it is difficult to adjust it to an inorganic compound having appropriate dispersibility as an inorganic compound for a flower thinning agent.

It should be noted that when the flower thinning agent of the present invention uses an electron microscope to measure an average particle diameter R greater than 0.03 μm, in a 10,000-fold photograph taken with an electron microscope S-2360N manufactured by Hitachi, the ruler (ゲ-ji) Measure the major axis and minor axis of the flower thinning agent present in the range of 3 cm x 3 cm in the center of the photograph, and obtain the average value. In addition, when the primary particle size is less than 0.03 μm, in the 100,000-fold photo taken with the electron microscope JEM-200CX manufactured by JEOL Ltd., the flower thinning agent existing in the center of the photo within the range of 3 cm × 3 cm is measured with a ruler Take the average value of the long and short diameters to find out.

The porosity S of the flower thinning agent made of calcium phosphate only needs to satisfy the following condition (n), but it is more preferable to satisfy the condition of (t), and it is still more preferable to satisfy the condition of (v).

(n)0.5≤S≤300

(t)0.5≤S≤100

(v)0.5≤S≤10

When the porosity S is greater than 300, since the porosity becomes too high, the release rate of the additive added to the water-insoluble inorganic compound becomes too slow, and the additive in the mixed preparation cannot be released in a sufficient amount during the pollination period of the flower. To inhibit the pollination of flowers during the pollination period, it is difficult to obtain a sufficient slow-release effect. On the other hand, when the porosity S is less than 0.5, the degree of aggregation of the poorly water-soluble inorganic compound is strong, and the sustained-release effect can hardly be expected, so that the adsorption of additives is insufficient or it becomes a flower thinning agent that is harmful to plants.

It should be noted that when calcium phosphate or the like used in the present invention is used, even if the particle diameter measured by electron microscope photography is large, particles with large porosity can be obtained, and even particles that are generally prone to phytotoxicity diameter, and by adjusting the porosity, it is also possible to easily prevent phytotoxicity, so it is preferable.

As the additive used in the present invention, can enumerate condensed phosphoric acid and its salt, lecithin, sterol, amino acid, sucrose fatty acid ester etc., these additives can be used alone or in combination of two or more, but from reducing the possibility of phytotoxicity , From the viewpoint of easily exerting more effective effects, at least one selected from lecithin and phytosterol is preferable.

Examples of the condensed phosphoric acid used in the present invention and salts thereof include alkali metal salts such as pyrophosphoric acid, tripolyphosphoric acid, metaphosphoric acid, and high polyphosphoric acid (hipolylinic acid). It should be noted that these compounds can be used alone or in combination.

Among the sterols of the present invention, examples of animal sterols include cholesterol and the like, and examples of phytosterols include stigmasterol, sitosterol, brassicasterol, brassicasterol, and the like. Considering the impact on the environment, etc., phytosterols are preferred. In addition, these sterols can be used individually or in combination.

Examples of amino acids in the present invention include neutral amino acids, acidic amino acids, and basic amino acids, and specifically, glycine, alanine, lysine, glutamic acid, aspartic acid, and the like. It should be noted that these amino acids can be used alone or in combination.

Examples of the lecithin of the present invention include soybean lecithin, egg yolk lecithin, high-purity lecithin, enzyme-decomposed lecithin, enzyme-treated lecithin, fractionated lecithin, enzyme-modified lecithin, hydroxylated lecithin, acetylated Lecithin, succinylated lecithin, hydrogenated lecithin, and the like are more preferable in terms of flower thinning effect, enzyme-treated lecithin, enzyme-modified lecithin, and enzyme-decomposed lecithin. It should be noted that these lecithins can be used alone or in combination.

Examples of the sucrose fatty acid ester of the present invention include sucrose fatty acid esters having an HLB of 1 to 19, but those having an HLB of 8 to 19 are preferred from the viewpoint of ease of handling in an aqueous system. Specifically, sucrose stearate, oleate, palmitate, myristate, palmitate, behenate, etc., but from the perspective of flower thinning effect, myristate, palmitate, etc. esters. In addition, these esters can be used individually or in combination.

The mixing ratio of the poorly water-soluble inorganic compound and the additive is preferably in the range of 0.005 to 200 parts by weight relative to 100 parts by weight of the poorly water-soluble inorganic compound. When the additive is at least In one configuration, when used in large amounts, the leaves and petals are prone to browning and the like, so it is preferably used in the range of 0.005 to 10 parts by weight, more preferably 0.005 to 3 parts by weight, and even more preferably 0.01 to 0.5 parts by weight. parts by weight.

Group (A): Sterols

In addition, when the additive is composed of at least one selected from the following group (B), the amount of the additive is preferably in the range of 0.5 to 200 parts by weight, more preferably 1 to 100 parts by weight, and even more preferably 3 to 50 parts by weight. parts by weight.

(B) group: condensed phosphoric acid and its salt, lecithin, amino acid, sucrose fatty acid ester

When the additive amount is less than 0.005 parts by weight relative to 100 parts by weight of the water-insoluble inorganic compound, the flower-thinning effect is not enough, so it is not good, and when it is more than 200 parts by weight, browning of leaves and upward growth phenomenon are likely to occur. The harm of medicine is also not good.

The flower thinning agent of the present invention may further contain acetic acid, gluconic acid, lactic acid, tartaric acid, succinic acid, fumaric acid, malic acid, glutamic acid, adipic acid, citric acid, and their salts one or more of the selected ones.

The flower thinning agent of the present invention can also be used after being diluted with a buffer solution or the like. However, although there is no particular problem in adjusting the pH value to between 4 and 10 at this time, it is preferable to use it in the range of pH 4.5 to 8.5 when further considering the influence on the human body and fruit trees, etc. Preferably, it exists in the range of pH5.5-8.0. In addition, as a buffer solution, a phosphate buffer solution, a carbonic acid buffer solution, etc. are used preferably.

The flower thinning agent of the present invention can be used in any state such as a hydrating agent, a fine/coarse powder agent, an emulsion, and a flowable agent.

The flower thinning agent of the present invention can be used alone or in combination of two or more emulsifiers, polysaccharides, low sugars, sugar alcohols, surfactants, modified starches, etc., as necessary, in order to improve solubility and the like.

Examples of the emulsifier include polyglycerin fatty acid esters, monoglycerin fatty acid esters, sorbitan fatty acid esters, and the like.

Examples of polysaccharides include thickening polysaccharides and soybean polysaccharides containing polymers of more than 10 monosaccharide residues. Examples of thickening polysaccharides include uelan gum, karaginan, sodium alginate, guaiac gum, jelan gum, karaya gum, CMC, methylcellulose, tamarind gum, gadei gum, tragacanth gum, and xanthan gum , pullulan, kasha gum, locust bean gum, arabinogalactan gum, sukurero gum, chitosan, etc. Soybean polysaccharides are water-soluble polysaccharides extracted from soybeans. Among them, water-soluble polysaccharides composed of galactose, galacturonic acid, rhamnose, xylose, fucose, and glucose with an average molecular weight of hundreds of thousands are preferred. sexual polysaccharides.

Examples of oligosaccharides include polymers containing 2 to 10 monosaccharide residues, such as reducing and non-reducing sugars, specifically trehalose, trehalose, maltose, cellobiose, Lactose, xylobiose, isomaltose, melibiose, パラチノ-ス, gentiobiose (ゲンチビオ-ス), maltooligosaccharides, isooligosaccharides, glucose oligosaccharides, galactooligosaccharides, soybean oligosaccharides, Xylo-oligosaccharides, lactulose-oligosaccharides, fructo-oligosaccharides, coupling sugars.

The sugar alcohol is not particularly limited as long as it is a chain polyhydric alcohol obtained by reducing the carbonyl group of sugars, and specific examples include maltitol, palachitol, lactitol, erythritol, xylitol, Mannitol, sorbitol, etc.

Examples of the surfactant include known cationic, anionic, amphoteric, nonionic, and other organic surfactants, or inorganic surfactants.

Processed starch is processed by chemical or physical methods, specifically acid-treated starch, alkali-treated starch, oxidized starch, cyclodextrin, dextrin, enzyme-treated starch, phosphated starch, acetic acid Ester starch, octenyl succinic acid starch, etherified starch, cross-linked starch, etc.

In addition, as mentioned above, because some flower thinning agents in the past are water-soluble flower thinning agents, for example, when the appropriate spreading time encounters rainy days, the flower thinning agent is easy to lose, so that the flower thinning effect is almost invisible. However, the flower thinning agent of the present invention is composed of a specific water-insoluble inorganic compound and an additive, and the additive is in a state of impregnation and adsorption, so it has the advantage that it is more difficult to be lost than the previous flower thinning agent. Furthermore, by using a substance having a binding effect such as polyvinyl alcohol, polybutene, and carboxymethyl cellulose in combination with the flower thinning agent of the present invention, the effect of preventing runoff in rainy weather can be further enhanced.

The preferred spreading method of flower thinning agent of the present invention for fruit trees is illustrated below. In the flowering of deciduous fruit trees such as apples, the central flowers of the terminal buds bloom first. Then, the side flowers of the terminal buds bloom a little later, and the axillary flowers bloom a few days to a week later. The flower thinning agent of the present invention may be sprayed when the central flower of the terminal bud is in full bloom, but it may also be sprayed several days before and after the spraying period as needed.

It should be noted that because some flower thinning agents in the past are water-soluble, when the flower thinning agent is used, the flower thinning agent is easy to be lost. Its effect is just prone to inconsistency, which is an existing problem, and in the case of using the flower thinning agent of the present invention, since it is composed of a specific water-insoluble inorganic compound and an additive, and the additive is in a state of impregnation and adsorption, the effect of the agent Because of its high durability, it is better than conventional flower thinners in being able to adapt to subtle differences in flowering periods due to climate change.

The flower thinning agent of the present invention has no adverse effects on the environment, has little worry about phytotoxicity, is hardly affected by regions, climates, etc., and can be used for apples, pears, peaches, grapes, persimmons, citrus, etc.

In addition, the flower thinning agent of the present invention can also be used in admixture with other agricultural chemicals such as insecticides, fertilizers, and the like.

Examples and comparative examples are shown below, and the present invention will be described in more detail, but the present invention is not limited by these examples. In addition, in the following description, unless otherwise indicated, "%" and "part" are based on weight.

Calcium carbonate, calcium phosphate, magnesium phosphate, and zeolite used in the present example and comparative example were prepared according to the following methods.

Calcium Carbonate I

To the 11% milk of lime, add 0.1% citric acid relative to the solid content of the milk of lime, and introduce carbon dioxide with a concentration of 25% to carry out the carbonation reaction. When the pH value of the system reaches 9.5, stop the carbonation reaction. Stir at 50° C. for 15 hours, and introduce carbon dioxide again to make the pH of the system below 7, thereby obtaining a white slurry. The white slurry was dehydrated with a filter press to obtain calcium carbonate I. Utilize the X-ray diffraction method to confirm that the white filter cake obtained is calcite type calcium carbonate.

calcium carbonate II

Introduce 25% carbon dioxide into 11% lime milk to carry out carbonation reaction. When the pH value of the system reaches 8, stop the carbonation reaction, stir at 50°C for 15 hours, and then introduce carbon dioxide again to make the pH value of the system to be Below 8, calcium carbonate slurry is obtained. Next, 1.5 L of 11% calcium hydroxide was added to 1 L of the calcium carbonate slurry, and then carbon dioxide was introduced again to make the pH of the system 7 or less to obtain a white slurry. The white slurry was dehydrated with a filter press, and then dried at 180° C. to obtain calcium carbonate II. It was confirmed by X-ray diffraction that the obtained white substance was calcite-type calcium carbonate.

Calcium Carbonate III

Introduce carbon dioxide with a concentration of 25% into 11% lime milk to carry out carbonation reaction. When the pH value of the system reaches 9.5, stop the carbonation reaction, stir at 50°C for 5 hours, and introduce carbon dioxide again to make the pH of the system A value of 7 or less gave a white slurry. The white slurry was dehydrated with a filter press to obtain calcium carbonate III. Utilize the X-ray diffraction method to confirm that the white filter cake obtained is calcite type calcium carbonate.

calcium carbonate IV

In 10% milk of lime, add citric acid that is 2% relative to the solid content of milk of lime, introduce the carbon dioxide that concentration is 20%, carry out carbonation reaction, when the pH value of system reaches 9.5, stop carbonation reaction, Stir at 50° C. for 5 hours, introduce carbon dioxide again, make the pH of the system below 7, and obtain a white slurry. The white slurry was dehydrated with a filter press to obtain calcium carbonate IV. Utilize the X-ray diffraction method to confirm that the white filter cake obtained is calcite type calcium carbonate.

calcium phosphate I

Under agitation, 10% phosphoric acid was added dropwise to 20% calcium carbonate (super one #2000, manufactured by Maruo Calcium Co., Ltd.) water slurry so that Ca/P (molar ratio)=3.33, and then at 50 Stirring at °C for 3 hours gave a white slurry. The white slurry was dehydrated with a filter press to obtain calcium phosphate I. It was confirmed by X-ray diffraction that the obtained white filter cake was a mixture of hydroxyapatite and calcite-type calcium carbonate.

calcium phosphate II

Under stirring, 10% phosphoric acid was added dropwise to 20% calcium carbonate (heavy calcium carbonate, manufactured by Maruo Calcium Co., Ltd.) water slurry so that Ca/P (molar ratio) = 4.00, and then the After stirring for 3 hours, a white slurry was obtained. This white slurry was dehydrated with a filter press, and then dried at 180° C. to obtain calcium phosphate II. It was confirmed by X-ray diffraction that the obtained white powder was a mixture of hydroxyapatite and calcite-type calcium carbonate.

calcium phosphate III

Under stirring, drop 0.05 mol of 50% citric acid into 1 mol of 11% calcium hydroxide slurry adjusted to 15°C within 300 seconds, then drop 0.66 mol of 30% phosphoric acid and 40% KOH within 600 seconds 0.15 mol of the mixture was then stirred at 80°C for 3 hours to obtain calcium phosphate III. It was confirmed by X-ray diffraction that the obtained white substance was amorphous calcium phosphate.

calcium phosphate IV

Under stirring, drop 0.05 mol of 50% citric acid into 1 mol of 11% calcium hydroxide slurry adjusted to 15°C within 300 seconds, then drop 0.66 mol of 30% phosphoric acid and 40% KOH within 600 seconds 0.05 mol of the mixture was then stirred at 80 °C for 3 hours to obtain a white slurry. The white slurry was dried with a spray dryer to obtain calcium phosphate IV. It was confirmed by X-ray diffraction that the obtained white powder was amorphous calcium phosphate.

calcium phosphate V

Under stirring, drop 0.05 mol of 50% citric acid into 1 mol of 11% calcium hydroxide slurry adjusted to 15°C within 300 seconds, then drop 0.66 mol of 30% phosphoric acid and 40% KOH within 600 seconds 0.15 mol of the mixture was then stirred at 80 °C for 3 hours to obtain a white slurry. Concentrate the above white slurry with an ultracentrifuge until the solid content is 50%, and add water again to obtain a slurry with the same concentration as before concentration. The above operation of concentration and reslurry was repeated 3 times to obtain calcium phosphate V. It was confirmed by X-ray diffraction that the obtained white matter cake was amorphous calcium phosphate.

calcium phosphate VI

Under stirring, 10% phosphoric acid was added dropwise to 20% calcium carbonate (Calcium F, manufactured by Sankyo Flour Co., Ltd.) water slurry so that Ca/P (molar ratio) = 3.00, and then the After stirring for 3 hours, a white slurry was obtained. The white slurry was dehydrated with a filter press to obtain calcium phosphate VI. The obtained white powder filter cake was confirmed to be a mixture of hydroxyapatite and calcite calcium carbonate by X-ray diffraction method.

calcium phosphate VII

Under stirring, 10% phosphoric acid was added dropwise to 20% calcium carbonate (NoA heavy carbon, manufactured by Maruo Calcium Co., Ltd.) aqueous slurry so that Ca/P (molar ratio) = 5.00, and then stirred at 50°C After 3 hours, a white slurry was obtained. The white slurry was dehydrated with a filter press to obtain calcium phosphate VII. It was confirmed by X-ray diffraction that the obtained white powder was a mixture of hydroxyapatite and calcite-type calcium carbonate.

Magnesium Phosphate

Under stirring, 0.66 mol of 30% phosphoric acid was added dropwise to 1 mol of magnesium hydroxide (manufactured by Maruo Calcium Co., Ltd.) at 15° C. over 600 seconds, followed by stirring at 80° C. for 3 hours to obtain a white slurry. The white slurry was washed with a rotary filter and dehydrated to obtain magnesium phosphate. The obtained white filter cake was confirmed to be trimagnesium phosphate by X-ray diffraction method.

Zeolite

The natural zeolite was pulverized and classified by H mill to obtain zeolite I.

Example 1

Use above-mentioned calcium carbonate I, with respect to 100 parts of calcium carbonate solids, add 40 parts of glycine and water, stir and mix, obtain the flower thinning agent of calcium carbonate solids concentration 30%. The average particle diameter (μm) P of the particles measured using the SALD-2000A laser particle size distribution meter for the obtained flower thinning agent, the BET specific surface area (m ² /g) Q, Q/P, and Q/P measured by the nitrogen adsorption method. Dys, Dxs, Dys/Dxs are shown in Table 1.

Embodiment 2～4, 6～11, 13, 14, 16, 18, 19, comparative example 1, 2, 4～7

According to Table 1, the poorly water-soluble inorganic compound was changed, and the types and parts by weight of additives were changed according to Table 1. In addition, the same method as in Example 1 was used to obtain the flower thinning agent. The average particle diameter (μm) P of the particles measured using the SALD-2000A laser type particle size distribution meter for the obtained flower thinning agent, the BET specific surface area (m ² /g) Q, Q/P, and Q/P measured by the nitrogen adsorption method. Dys, Dxs, Dys/Dxs are shown in Table 1 and Table 2. Table 3 shows the average particle diameter (μm) R and porosity S of the flower thinning agent whose poorly water-soluble inorganic compound is calcium phosphate measured by electron microscopy.

Example 5

Using the above-mentioned calcium carbonate III, with respect to 100 parts of calcium carbonate solids, add 0.05 part of sterol A, stir and mix to obtain a flower thinning agent with a concentration of calcium carbonate solids of 10%. The average particle diameter (μm) P of the particles measured using the SALD-2000A laser type particle size distribution meter for the obtained flower thinning agent, the BET specific surface area (m ² /g) Q, Q/P, and Q/P measured by the nitrogen adsorption method. Dys, Dxs, Dys/Dxs are shown in Table 1.

It should be noted that the sterol A was dissolved in a 10% pentaglycerol fatty acid ester solution at 65° C. at a solid weight ratio of 1:30.

Embodiment 12, 15, 17, comparative example 3, 8

According to Table 1 and Table 2, the poorly water-soluble inorganic compound was changed, and the types and weight parts of additives were changed according to Table 1 and Table 2. In addition, the same method as in Example 5 was used to obtain the flower thinning agent. The average particle diameter (μm) P of the particles measured using the SALD-2000A laser particle size distribution meter for the obtained flower thinning agent, the BET specific surface area (m ² /g) Q, Q/P, and Q/P measured by the nitrogen adsorption method. Dys, Dxs, Dys/Dxs are shown in Table 1 and Table 2. Table 3 shows the average particle diameter (μm) R and porosity S of the flower thinning agent whose poorly water-soluble inorganic compound is calcium phosphate measured by electron microscopy.

Embodiment 20, 21, comparative example 9, 10

The flower thinning agents prepared in Examples 7 and 12 and Comparative Examples 1 and 5 were dried with a spray drier to obtain flower thinning agent powder. In addition, Example 20 and Comparative Example 9 were obtained by adding 10 parts of gum arabic to 100 parts of inorganic compounds before drying, followed by drying. The average particle diameter (μm) P of the particles measured using the SALD-2000A laser particle size distribution meter for the obtained flower thinning agent, the BET specific surface area (m ² /g) Q, Q/P, and Q/P measured by the nitrogen adsorption method. Tables 1 to 3 show Dys, Dxs, Dys/Dxs, average particle diameter (μm) R, and porosity S of particles measured by electron microscopy.

Table 1 poorly water soluble inorganic compounds additive Characteristics of flower thinning agent type Add quantity Average particle size Pμm BET specific surface area Qm ² /g Q/P Dys Dxs Dys/Dxs Example 1 Calcium Carbonate I Glycine 40 1.43 26.2 18.3 2.16 0.030 72.00 Example 2 calcium carbonate II SE 0.3 5.12 4.2 0.8 2.23 1.054 2.12 Example 3 Heavy Calcium Carbonate I Na hexametaphosphate 180 1.45 5.7 3.9 1.50 0.350 4.28 Example 4 calcium phosphate III High Purity Lecithin 45 1.58 80.3 50.8 1.62 0.015 108.00 Example 5 Calcium Carbonate III Sterol A 0.05 1.20 18.2 15.2 1.74 0.045 38.67 Example 6 calcium phosphate IV High Purity Lecithin 1.5 1.62 189.3 48.9 1.81 0.018 100.56 Example 7 Magnesium Phosphate Enzyme breaks down lecithin sterol A 200.02 2.36 95.1 40.3 0.98 0.009 102.22 Example 8 tricalcium phosphate Enzyme treated lecithin 30 2.18 51.3 23.5 0.89 0.052 17.12 Example 9 Silica I Sterol B 0.05 2.75 721.5 262.4 1.92 0.350 5.49 Example 10 Silica II Enzyme breaks down lecithin 20 0.33 126.5 383.3 7.68 0.066 116.36 Example 11 calcium phosphate V Hydroxylated Lecithin 90 1.58 92.3 58.4 1.48 0.015 98.67 Example 12 calcium phosphate I Sterol A 0.04 6.10 90.3 14.8 5.02 1.636 3.07 Example 13 calcium carbonate II SE 210 5.25 4.0 0.8 2.35 1.054 2.23 Example 14 calcium phosphate VI High Purity Lecithin SE 2025 1.39 129.3 93.0 3.21 1.636 1.96 Example 15 magnesium carbonate Sterol A 0.008 2.18 23.4 10.7 2.09 3.19 0.66 Example 16 Zeolite I High Purity Lecithin 20 28.62 38.3 1.3 0.98 0.921 1.06 Example 17 calcium phosphate II Sterol A 2.8 13.18 44.3 3.4 3.21 2.102 1.53 Example 18 Silica III High Purity Lecithin 10 2.52 277.9 110.3 2.1 0.284 7.39 Example 19 calcium carbonate IV Enzyme breaks down lecithin 15 1.47 43.5 29.6 1.71 0.020 85.5 Example 20 Magnesium Phosphate Enzyme breaks down lecithin sterol A 200.02 2.45 92.6 37.6 1.01 0.010 101.00 Example 21 calcium phosphate I Sterol A 0.04 6.02 90.0 15.0 5.21 1.626 3.20

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area measured by nitrogen adsorption method (m ² /g)

Dys: In the mercury intrusion method, the point at which the increase in mercury intrusion (Log Differential intrusion) reaches the maximum value (ml/g)

Dxs: Average pore diameter of Dys

Heavy calcium carbonate I: R heavy charcoal (manufactured by Maruo Calcium Co., Ltd.)

Tricalcium phosphate: Tricalcium phosphate: (manufactured by Taiping Chemical Industry Co., Ltd.)

Silica I: CX-200 (manufactured by Nippon Silica Industry Co., Ltd.)

Silica II: Aerosil 130 (manufactured by Japan Aerosil Co., Ltd.)

Silica III: AZ400 (manufactured by Nippon Silica Industry Co., Ltd.)

Magnesium carbonate: heavy magnesium carbonate (manufactured by Tomita Pharmaceutical Co., Ltd.)

Enzymatic decomposition of lecithin: SLP-ペ一ストリゾ (manufactured by T&K Lecithin Co., Ltd.)

High-purity lecithin: SLP-ホワイト (manufactured by T&K Lecithin Co., Ltd.)

Sterol A: GENEROL 100 (manufactured by Cognis Japan)

Sterol B: zoosterol

SE: Sucrose stearate (manufactured by Mitsubishi Chemical Fuzu Co., Ltd.)

Na hexametaphosphate: Sodium hexametaphosphate (manufactured by Taiping Chemical Industry Co., Ltd.)

Hydroxylated lecithin: Hydroxylated lecithin (manufactured by T&K Lecithin Co., Ltd.)

Table 2 poorly water soluble inorganic compounds additive Characteristics of flower thinning agent type Add quantity Average particle size Pμm BET specific surface area Qm ² /g Q/P Dys Dxs Dys/Dx Comparative example 1 Ground Calcium Carbonate II SE 10 21.3 0.5 0.02 0.70 3.882 0.18 Comparative example 2 Ground Calcium Carbonate III High Purity Lecithin 45 4.36 1.3 0.3 1.27 0.919 1.38 Comparative example 3 Zeolite II Sterol A 0.1 6.10 810.5 132.9 2.15 0.019 113.16 Comparative example 4 calcium phosphate VII High Purity Lecithin 10 48.21 48.0 1.00 3.99 2.06 0.77 Comparative Example 5 calcium bicarbonate I Enzyme breaks down lecithin 40 70.32 0.3 0.004 2.88 15.774 0.18 Comparative example 6 Silica I - - 2.83 722.9 255.4 1.87 0.350 5.34 Comparative Example 7 calcium phosphate I - - 6.25 88.0 14.1 4.99 1.636 3.05 Comparative Example 8 Calcium Hydrogen Phosphate II Sterol A 0.05 42.81 2.1 0.05 3.11 13.949 0.22 Comparative Example 9 Ground Calcium Carbonate II SE 10 23.0 0.5 0.02 0.67 3.882 0.17 Comparative Example 10 Dibasic calcium phosphate I Enzyme breaks down lecithin 40 72.11 0.3 0.004 2.13 15.102 0.14

P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter

Q: BET specific surface area measured by nitrogen adsorption method (m ² /g)

Dys: In the mercury intrusion method, the point at which the increase in mercury intrusion (Log Differential intrusion) reaches the maximum value (ml/g)

Dxs: Average pore diameter of Dys

Heavy calcium carbonate II: R heavy carbon (manufactured by Maruo Calcium Co., Ltd.)

Heavy calcium carbonate III: スパパーSS (manufactured by Maruo Calcium Co., Ltd.)

Zeolite II: HSZ320NAA (manufactured by Tosoh Corporation)

Calcium hydrogen phosphate I: Calcium monohydrogen phosphate Reagent special grade (manufactured by Wako Pure Chemical Industries)

Silica I: CX-200 (manufactured by Nippon Silica Industry Co., Ltd.)

Calcium hydrogen phosphate II: Calcium monohydrogen phosphate (manufactured by Taiping Chemical Industry Co., Ltd.)

SE: Sucrose stearate (manufactured by Mitsubishi Chemical Fuzu Co., Ltd.)

High-purity lecithin: SLP-ホワイト (manufactured by T&K Lecithin Co., Ltd.)

Sterol A: GENEROL 100 (manufactured by Cognis Japan)

Enzymatic decomposition of lecithin: SLP-ペ一ストリゾ (manufactured by T&K Lecithin Co., Ltd.)

table 3 poorly water soluble inorganic compounds additive Characteristics of flower thinning agent type Add quantity Average particle size Rμm Specific surface area Q1m ² /g calculated from R BET specific surface area Qm ² /g Porosity S Example 4 calcium phosphate III High Purity Lecithin 45 0.03 63.7 80.3 1.3 Example 6 calcium phosphate IV High Purity Lecithin 1.5 0.04 47.8 189.3 4.0 Example 8 tricalcium phosphate Enzyme breaks down lecithin 30 0.06 31.8 51.3 1.4 Example 11 calcium phosphate V Hydroxylated Lecithin 90 0.03 63.7 92.3 1.5 Example 12 calcium phosphate I Sterol A 0.04 6.00 0.32 90.3 282.2 Example 14 calcium phosphate VI High Purity Lecithin SE 2025 1.28 1.5 129.3 86.3 Example 17 calcium phosphate II Sterol A 2.8 12.02 0.16 44.3 276.9 Example 21 calcium phosphate I Sterol A 0.04 6.10 0.32 90.0 281.2 Comparative example 4 calcium phosphate VII High Purity Lecithin 10 42.25 0.05 48.0 960.0 Comparative Example 5 calcium bicarbonate I Enzyme breaks down lecithin 40 72.3 0.03 0.3 10.0 Comparative Example 7 calcium phosphate I - - 6.11 0.32 88.0 275.0 Comparative Example 8 Calcium Hydrogen Phosphate II Sterol A 0.05 45.25 0.04 2.1 52.5 Comparative Example 10 Dibasic calcium phosphate I Enzyme breaks down lecithin 40 75.73 0.03 0.3 10.0

Q: BET specific surface area measured by nitrogen adsorption method (m ² /g)

R: Average particle diameter (μm) of particles measured by electron microscope photography

S: porosity (specific surface area Q1 (m ² /g) calculated from Q/R)

Application example 1

Confirmation of flower thinning effect was performed using apple (Fuji) tree. That is, using the above-mentioned apple trees, the flower thinning agent of Example 1 was sprayed at the concentration shown in Table 4 twice after the central flower bloomed 1 day and 3 days later. It should be noted that the concentration of the active ingredient is based on the weight solids of the poorly water-soluble inorganic compound. In addition, each branch was treated (branch-specific treatment), and sprayed with a backpack sprayer.

The evaluation is expressed by the fruiting rate with respect to the center flower and the side flower. In addition, regarding the phytotoxicity, the observation results of the states of leaves such as fallen leaves, discolored leaves, and odd-shaped leaves are shown in the following five levels. The results are shown in Table 4.

◎: normal

○: Minimal hazard

□: Little harm

△: moderate hazard

×: Great hazard

Application examples 2-21, comparative application examples 1-10

Except having used the flower thinning agent of Examples 2-21 and Comparative Examples 1-10 instead of the flower thinning agent of Example 1, it tested by the method similar to application example 1. The results are shown in Table 4 and Table 5.

Comparative Application Example 11

A test was performed in the same manner as in Application Example 1 except that the flower thinning agent containing lime-sulfur mixture as an active ingredient was used instead of the flower thinning agent of Example 1. The results are shown in Table 5.

Comparative application example 12

A test was performed in the same manner as in Application Example 1 except that the flower thinning agent containing itaconic acid as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of itaconic acid. The results are shown in Table 5.

Comparative application example 13

A test was performed in the same manner as in Application Example 1 except that the flower thinning agent containing high-purity lecithin as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of high-purity lecithin. The results are shown in Table 5.

Comparative application example 14

Except having used water (control) instead of the flower thinning agent of Example 1, it tested by the method similar to application example 1. The results are shown in Table 5.

Table 4 flower thinning agent used Active ingredient concentration (%) Result rate (%) Phytotoxicity side flower center flower Application example 1 The flower thinning agent of embodiment 1 0.33 49.3 91.3 ◎ 1.00 47.1 89.9 ◎ Application example 2 The flower thinning agent of embodiment 2 0.33 64.9 92.3 ◎ 1.00 60.2 88.5 ◎ Application example 3 The flower thinning agent of embodiment 3 0.33 52.3 90.3 ○ 1.00 49.8 88.1 □ Application example 4 The flower thinning agent of embodiment 4 0.33 39.2 90.1 ◎ 1.00 38.6 89.9 ◎ Application example 5 The flower thinning agent of embodiment 5 0.33 54.0 88.5 ◎ 1.00 51.1 87.2 ◎ Application example 6 The flower thinning agent of embodiment 6 0.33 48.5 90.2 ◎ 1.00 45.9 89.9 ◎ Application example 7 The flower thinning agent of embodiment 7 0.33 37.6 90.6 ◎ 1.00 35.8 86.3 ◎ Application example 8 The flower thinning agent of embodiment 8 0.33 42.3 93.2 ◎ 1.00 39.9 89.1 ◎ Application example 9 The flower thinning agent of embodiment 9 0.33 64.3 89.3 ◎ 1.00 59.2 88.2 ◎ Application Example 10 The flower thinning agent of embodiment 10 0.33 51.3 91.2 ◎ 1.00 49.5 89.3 ◎ Application Example 11 The flower thinning agent of embodiment 11 0.33 41.3 87.3 ◎ 1.00 39.8 86.9 ○ Application example 12 The flower thinning agent of embodiment 12 0.33 54.9 86.3 ◎ 1.00 51.2 86.5 ◎ Application Example 13 The flower thinning agent of embodiment 13 0.33 48.2 90.3 □ 1.00 46.8 88.4 □ Application Example 14 The flower thinning agent of embodiment 14 0.33 46.2 90.1 ◎ 1.00 44.6 88.9 ◎ Application Example 15 The flower thinning agent of embodiment 15 0.33 47.5 91.4 ◎ 1.00 43.3 89.2 ◎ Application Example 16 The flower thinning agent of embodiment 16 0.33 45.2 90.2 ○ 1.00 42.5 89.9 ○ Application Example 17 The flower thinning agent of embodiment 17 0.33 54.6 91.6 ◎ 1.00 48.0 88.8 ○ Application Example 18 The flower thinning agent of embodiment 18 0.33 52.2 91.1 ◎ 1.00 49.6 88.9 ◎ Application Example 19 The flower thinning agent of embodiment 19 0.33 42.1 91.6 ◎ 1.00 40.2 88.9 ◎ Application example 20 The flower thinning agent of embodiment 20 0.33 40.9 88.3 ◎ 1.00 36.2 88.2 ◎ Application example 21 The flower thinning agent of embodiment 21 0.33 54.1 87.3 ◎ 1.00 50.2 86.5 ◎

table 5 flower thinning agent used Active ingredient concentration (%) Result rate (%) Phytotoxicity side flower center flower Comparative application example 1 The flower thinning agent of comparative example 1 0.33 65.3 90.2 □ 1.00 63.8 88.2 △ Comparative application example 2 The flower thinning agent of comparative example 2 0.33 62.9 91.1 △ 1.00 60.2 87.5 △ Comparative application example 3 The flower thinning agent of comparative example 3 0.33 81.8 91.3 ◎ 1.00 78.1 92.1 ◎ Comparative application example 4 The flower thinning agent of comparative example 4 0.33 64.6 91.5 △ 1.00 63.6 90.9 △ Comparative application example 5 The flower thinning agent of comparative example 5 0.33 65.2 89.5 △ 1.00 62.9 87.3 △ Comparative application example 6 The flower thinning agent of comparative example 6 0.33 78.2 92.2 ◎ 1.00 75.9 90.2 ◎ Comparative application example 7 The flower thinning agent of comparative example 7 0.33 81.1 92.9 ◎ 1.00 79.2 91.3 ◎ Comparative application example 8 The flower thinning agent of comparative example 8 0.33 61.2 89.5 △ 1.00 59.9 87.3 △ Comparative application example 9 The flower thinning agent of comparative example 9 0.33 65.3 90.2 □ 1.00 63.8 88.2 △ Comparative application example 10 The flower thinning agent of comparative example 10 0.33 66.2 90.5 △ 1.00 62.0 89.1 △ Comparative Application Example 11 lime sulfur mixture 0.33 55.2 88.3 △ 1.00 49.1 84.2 △ Comparative Application Example 12 itaconic acid 0.33 57.9 88.2 △ 1.00 50.3 85.4 x Comparative application example 13 High Purity Lecithin 0.15 65.9 88.2 △ 0.45 60.3 85.4 △ Comparative application example 14 water (control) - 88.2 93.1 ◎

Application example 22

Confirmation of the flower thinning effect was performed using a pear (Sachimizu) tree. That is, using the above-mentioned pear tree, when the flowering rate was 30% and 80%, it was carried out twice, and the flower thinning agent of Example 1 was sprayed according to the concentration shown in Table 6. It should be noted that the concentration of the active ingredient is based on the weight solids of the poorly water-soluble inorganic compound. In addition, each sprig was treated and distributed using a backpack sprayer.

The evaluation was expressed by the fruiting rate relative to the number of blooms. In addition, regarding the phytotoxicity, the observation results of the states of leaves such as fallen leaves, discolored leaves, and odd-shaped leaves are shown in the following five levels. The results are shown in Table 6.

◎: Normal

○: Minimal hazard

□: Little harm

△: moderate hazard

×: Great hazard

Application examples 23-42, comparative application examples 15-24

Except having used the flower thinning agent of Examples 2-21 and Comparative Examples 1-10 instead of the flower thinning agent of Example 1, it tested by the method similar to application example 22. The results are shown in Table 6 and Table 7.

Comparative application example 25

A test was performed in the same manner as in Application Example 22 except that the flower thinning agent containing lime-sulfur mixture as an active ingredient was used instead of the flower thinning agent of Example 1. The results are shown in Table 7.

Comparative application example 26

A test was performed in the same manner as in Application Example 22 except that the flower thinning agent containing itaconic acid as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of itaconic acid. The results are shown in Table 7.

Comparative application example 27

A test was performed in the same manner as in Application Example 22 except that the flower thinning agent containing high-purity lecithin as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of high-purity lecithin. The results are shown in Table 7.

Comparative application example 28

Except having used water (control) instead of the flower thinning agent of Example 1, it tested by the method similar to application example 22. The results are shown in Table 7.

Table 6 flower thinning agent used Active ingredient concentration (%) Result rate (%) Phytotoxicity Application example 22 The flower thinning agent of embodiment 1 0.33 50.4 ◎ 1.00 49.0 ◎ Application example 23 The flower thinning agent of embodiment 2 0.33 67.9 ◎ 1.00 62.5 ◎ Application example 24 The flower thinning agent of embodiment 3 0.33 55.3 ○ 1.00 51.8 □ Application example 25 The flower thinning agent of embodiment 4 0.33 39.8 ◎ 1.00 38.9 ◎ Application example 26 The flower thinning agent of embodiment 5 0.33 55.5 ◎ 1.00 52.3 ◎ Application Example 27 The flower thinning agent of embodiment 6 0.33 50.5 ◎ 1.00 47.7 ◎ Application Example 28 The flower thinning agent of embodiment 7 0.33 38.6 ◎ 1.00 35.8 ◎ Application Example 29 The flower thinning agent of embodiment 8 0.33 44.3 ◎ 1.00 39.9 ◎ Application example 30 The flower thinning agent of embodiment 9 0.33 65.5 ◎ 1.00 60.9 ◎ Application Example 31 The flower thinning agent of embodiment 10 0.33 55.3 ◎ 1.00 51.7 ◎ Application example 32 The flower thinning agent of embodiment 11 0.33 44.3 ◎ 1.00 42.5 ○ Application Example 33 The flower thinning agent of embodiment 12 0.33 56.9 ◎ 1.00 52.2 ◎ Application example 34 The flower thinning agent of embodiment 13 0.33 51.2 □ 1.00 49.1 □ Application example 35 The flower thinning agent of embodiment 14 0.33 48.2 ◎ 1.00 44.8 ◎ Application example 36 The flower thinning agent of embodiment 15 0.33 49.1 ◎ 1.00 47.8 ◎ Application Example 37 The flower thinning agent of embodiment 16 0.33 48.2 ○ 1.00 46.5 ○ Application example 38 The flower thinning agent of embodiment 17 0.33 57.1 ◎ 1.00 53.9 ○ Application Example 39 The flower thinning agent of embodiment 18 0.33 54.1 ◎ 1.00 50.6 ◎ Application example 40 The flower thinning agent of embodiment 19 0.33 42.2 ◎ 1.00 40.8 ◎ Application Example 41 The flower thinning agent of embodiment 20 0.33 40.2 ◎ 1.00 38.5 ◎ Application Example 42 The flower thinning agent of embodiment 21 0.33 57.8 ◎ 1.00 53.5 ◎

Table 7 flower thinning agent used Active ingredient concentration (%) Result rate (%) Phytotoxicity Comparative application example 15 The flower thinning agent of comparative example 1 0.33 70.3 □ 1.00 68.8 △ Comparative Application Example 16 The flower thinning agent of comparative example 2 0.33 68.0 △ 1.00 66.2 △ Comparative application example 17 The flower thinning agent of comparative example 3 0.33 83.8 ◎ 1.00 81.0 ◎ Comparative Application Example 18 The flower thinning agent of comparative example 4 0.33 70.6 △ 1.00 68.6 △ Comparative Application Example 19 The flower thinning agent of comparative example 5 0.33 68.2 △ 1.00 66.9 △ Comparative application example 20 The flower thinning agent of comparative example 6 0.33 82.2 ◎ 1.00 79.9 ◎ Comparative Application Example 21 The flower thinning agent of comparative example 7 0.33 84.7 ◎ 1.00 81.7 ◎ Comparative application example 22 The flower thinning agent of comparative example 8 0.33 66.6 △ 1.00 64.9 △ Comparative application example 23 The flower thinning agent of comparative example 9 0.33 72.7 △ 1.00 69.9 △ Comparative application example 24 The flower thinning agent of comparative example 10 0.33 66.1 △ 1.00 64.0 △ Comparative application example 25 lime sulfur mixture 0.33 57.1 △ 1.00 50.1 △ Comparative application example 26 itaconic acid 0.33 57.9 △ 1.00 53.3 x Comparative application example 27 High Purity Lecithin 0.15 72.9 △ 0.45 67.3 △ Comparative application example 28 water (control) - 90.1 ◎

Application Example 43

The effect of flower thinning was confirmed using grape (kingdella) trees. That is, using the above-mentioned vines, the flower thinning agent of Example 1 was sprayed at the concentration shown in Table 8 twice at flowering rates of 30% and 80%. It should be noted that the concentration of the active ingredient is based on the weight solids of the poorly water-soluble inorganic compound. In addition, branch treatment was carried out and distribution was carried out using a backpack sprayer.

The evaluation was expressed by the fruiting rate relative to the number of blooms. In addition, regarding the phytotoxicity, the observation results of the states of leaves such as fallen leaves, discolored leaves, and odd-shaped leaves are shown in the following five levels. The results are shown in Table 8.

◎: normal

○: Minimal hazard

□: Little harm

△: moderate hazard

×: Great hazard

Application Examples 44-63, Comparative Application Examples 29-38

Except having used the flower thinning agent of Examples 2-21 and Comparative Examples 1-10 instead of the flower thinning agent of Example 1, it tested by the method similar to application example 43. The results are shown in Table 8 and Table 9.

Comparative application example 39

A test was performed in the same manner as in Application Example 43 except that the flower thinning agent containing lime-sulfur mixture as an active ingredient was used instead of the flower thinning agent of Example 1. The results are shown in Table 9.

Comparative Application Example 40

A test was performed in the same manner as in Application Example 43 except that the flower thinning agent containing itaconic acid as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of itaconic acid. The results are shown in Table 9.

Comparative application example 41

A test was performed in the same manner as in Application Example 43 except that the flower thinning agent containing high-purity lecithin as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of high-purity lecithin. The results are shown in Table 9.

Comparative application example 42

A test was performed in the same manner as in Application Example 43 except that water (comparative) was used instead of the flower thinning agent of Example 1. The results are shown in Table 9.

Application example 64

Confirmation of the flower thinning effect was performed using a pear (Sachimizu) tree. That is, using the above-mentioned pear trees, the flower thinning agent of Example 1 was sprayed at the concentration shown in Table 10 twice when the flowering rate was 30% and 80%. However, when this experiment was carried out, the temperature at the time of flowering was low and the climate was abnormal. Consequently, the irregularity of flowering often increases. It should be noted that the concentration of the active ingredient is based on the weight solids of the poorly water-soluble inorganic compound. In addition, branch treatment was carried out and distribution was carried out using a backpack sprayer.

The evaluation was expressed by the fruiting rate relative to the number of blooms. In addition, regarding the phytotoxicity, the observation results of the states of leaves such as fallen leaves, discolored leaves, and odd-shaped leaves are shown in the following five levels. The results are shown in Table 9.

◎: normal

○: Minimal hazard

□: Little harm

△: moderate hazard

×: Great hazard

Table 8 flower thinning agent used Active ingredient concentration (%) Result rate (%) Phytotoxicity Application Example 43 The flower thinning agent of embodiment 1 0.33 50.2 ◎ 1.00 46.2 ◎ Application example 44 The flower thinning agent of embodiment 2 0.33 65.9 ◎ 1.00 63.4 ◎ Application Example 45 The flower thinning agent of embodiment 3 0.33 55.4 ○ 1.00 51.6 □ Application Example 46 The flower thinning agent of embodiment 4 0.33 39.5 ◎ 1.00 38.0 ◎ Application Example 47 The flower thinning agent of embodiment 5 0.33 56.5 ◎ 1.00 52.0 ◎ Application Example 48 The flower thinning agent of embodiment 6 0.33 49.9 ◎ 1.00 45.3 ◎ Application Example 49 The flower thinning agent of embodiment 7 0.33 38.5 ◎ 1.00 35.1 ◎ Application example 50 The flower thinning agent of embodiment 8 0.33 44.8 ◎ 1.00 39.5 ◎ Application example 51 The flower thinning agent of embodiment 9 0.33 65.9 ◎ 1.00 60.5 ◎ Application example 52 The flower thinning agent of embodiment 10 0.33 55.5 ◎ 1.00 51.3 ◎ Application example 53 The flower thinning agent of embodiment 11 0.33 43.8 ◎ 1.00 41.5 ○ Application example 54 The flower thinning agent of embodiment 12 0.33 55.8 ◎ 1.00 52.1 ◎ Application example 55 The flower thinning agent of embodiment 13 0.33 51.9 □ 1.00 49.8 □ Application example 56 The flower thinning agent of embodiment 14 0.33 48.9 ◎ 1.00 46.2 ◎ Application Example 57 The flower thinning agent of embodiment 15 0.33 49.9 ◎ 1.00 45.5 ◎ Application example 58 The flower thinning agent of embodiment 16 0.33 48.0 ○ 1.00 46.1 ○ Application Example 59 The flower thinning agent of embodiment 17 0.33 55.1 ◎ 1.00 52.1 ○ Application example 60 The flower thinning agent of embodiment 18 0.33 54.8 ◎ 1.00 50.2 ◎ Application example 61 The flower thinning agent of embodiment 19 0.33 43.9 ◎ 1.00 41.8 ◎ Application example 62 The flower thinning agent of embodiment 20 0.33 38.3 ◎ 1.00 35.8 ◎ Application example 63 The flower thinning agent of embodiment 21 0.33 56.8 ◎ 1.00 53.8 ◎

Table 9 flower thinning agent used Active ingredient concentration (%) Result rate (%) Phytotoxicity Comparative application example 29 The flower thinning agent of comparative example 1 0.33 71.3 □ 1.00 68.9 △ Comparative application example 30 The flower thinning agent of comparative example 2 0.33 68.0 △ 1.00 66.2 △ Comparative application example 31 The flower thinning agent of comparative example 3 0.33 83.5 ◎ 1.00 81.5 ◎ Comparative application example 32 The flower thinning agent of comparative example 4 0.33 70.1 △ 1.00 68.9 △ Comparative application example 33 The flower thinning agent of comparative example 5 0.33 68.2 △ 1.00 66.5 △ Comparative application example 34 The flower thinning agent of comparative example 6 0.33 82.2 ◎ 1.00 79.5 ◎ Comparative Application Example 35 The flower thinning agent of comparative example 7 0.33 84.2 ◎ 1.00 81.2 ◎ Comparative application example 36 The flower thinning agent of comparative example 8 0.33 66.6 △ 1.00 64.5 △ Comparative application example 37 The flower thinning agent of comparative example 9 0.33 73.7 △ 1.00 69.9 △ Comparative application example 38 The flower thinning agent of comparative example 10 0.33 67.2 △ 1.00 64.5 △ Comparative application example 39 lime sulfur mixture 0.33 57.5 △ 1.00 50.5 △ Comparative Application Example 40 itaconic acid 0.33 57.5 △ 1.00 53.0 x Comparative application example 41 High Purity Lecithin 0.15 72.5 △ 0.45 67.0 △ Comparative application example 42 water (control) - 91.2 ◎

Application examples 65-70, comparative application examples 43-46

Use the flower thinning agent of embodiment 4, 5, 7, 9, 15, 21, comparative example 1, 4, 8, 10 to replace the flower thinning agent of embodiment 1, in addition, according to the same method as application example 64 experimenting. The results are shown in Table 10 and Table 11.

Comparative application example 47

A test was performed in the same manner as in Application Example 64, except that the flower thinning agent containing lime-sulfur mixture as an active ingredient was used instead of the flower thinning agent of Example 1. The results are shown in Table 11.

Comparative application example 48

A test was performed in the same manner as in Application Example 64 except that the flower thinning agent containing itaconic acid as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of itaconic acid. The results are shown in Table 11.

Comparative application example 49

A test was performed in the same manner as in Application Example 64 except that the flower thinning agent containing high-purity lecithin as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the concentration of active ingredients is based on the weight solids of high-purity lecithin. The results are shown in Table 11.

Comparative Application Example 50

A test was performed in the same manner as in Application Example 64 except that the flower thinning agent containing calcium formate as an active ingredient was used instead of the flower thinning agent of Example 1. It should be noted that the active ingredient concentration is based on the weight solids of calcium formate. The results are shown in Table 11.

Comparative application example 51

Except having used water (comparative) instead of the flower thinning agent of Example 1, it tested by the method similar to application example 64. The results are shown in Table 11.

Table 10 flower thinning agent used Active ingredient concentration (%) Result rate (%) Phytotoxicity Application example 64 The flower thinning agent of embodiment 1 0.33 54.5 ◎ 1.00 51.9 ◎ Application example 65 The flower thinning agent of embodiment 4 0.33 42.2 ◎ 1.00 38.9 ◎ Application example 66 The flower thinning agent of embodiment 5 0.33 58.6 ◎ 1.00 55.0 ◎ Application example 67 The flower thinning agent of embodiment 7 0.33 39.6 ◎ 1.00 36.2 ◎ Application example 68 The flower thinning agent of embodiment 9 0.33 66.8 ◎ 1.00 61.8 ◎ Application example 69 The flower thinning agent of embodiment 15 0.33 53.2 ◎ 1.00 49.7 ◎ Application example 70 The flower thinning agent of embodiment 21 0.33 57.0 ◎ 1.00 52.6 ◎

Table 11 flower thinning agent used Active ingredient concentration (%) Fruiting rate (%) side flower Phytotoxicity Comparative application example 43 The flower thinning agent of comparative example 1 0.33 76.3 □ 1.00 74.4 △ Comparative application example 44 The flower thinning agent of comparative example 4 0.33 76.2 □ 1.00 74.6 △ Comparative application example 45 The flower thinning agent of comparative example 8 0.33 72.6 △ 1.00 70.9 △ Comparative application example 46 The flower thinning agent of comparative example 10 0.33 71.9 △ 1.00 69.0 △ Comparative application example 47 lime sulfur mixture 0.33 65.1 △ 1.00 60.1 △ Comparative application example 48 itaconic acid 0.33 70.0 △ 1.00 63.9 x Comparative application example 49 High Purity Lecithin 0.15 80.1 □ 0.45 73.1 △ Comparative Application Example 50 calcium formate 0.15 79.9 □ 0.45 72.3 △ Comparative application example 51 water (control) - 91.7 ◎

As shown in the above-mentioned Tables 4 to 11, the flower thinning agents of the present invention used in Application Examples 1 to 70 showed a moderate flower thinning effect and hardly caused phytotoxicity.

On the other hand, in the flower thinning agent used in Comparative Application Example 3, since the BET specific surface area of the poorly water-soluble inorganic compound was too large, the flower thinning effect was delayed and the flower thinning effect was insufficient. In addition, in the flower thinning agents of Comparative Application Examples 11 to 13, occurrence of remarkable phytotoxicity was observed. Furthermore, as shown in Table 10 and Table 11, using the flower thinning agents of Comparative Application Examples 47-50 containing the existing flower thinning agents, compared with normal weather, the flower thinning effect is significantly reduced, while the flower thinning agent of the present invention Even in abnormal weather occasions, it can also play a certain flower thinning effect.

Industrial Utilization Possibility

As mentioned above, the flower thinning agent of the present invention is harmless to the human body, is easy to handle in terms of environment, and has a high flower thinning effect. In addition, the flower thinning agent of the present invention is also excellent in the sustained release effect, so the degree of freedom in the spraying period is wider than before, and the convenience of use is also excellent.

Claims (11)

1. a kind of flower thinning agent, is made of the mixed preparation of water insoluble inorganic compound and additive, it is characterized in that, it satisfies the condition of following (a), (b) and (c): (a) 0.03≤P≤30 (b) 3≤Q≤800 (c) 0.5≤Q/P≤1000 P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter Q: BET specific surface area (m ² /g) measured by nitrogen adsorption method. 2. a kind of flower thinning agent, is made of the mixed preparation of water insoluble inorganic compound and additive, it is characterized in that, it satisfies the condition of following (d), (e) and (f): (d) 0.03≤P≤10 (e) 7≤Q≤300 (f)0.5≤Q/P≤300 P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter Q: BET specific surface area (m ² /g) measured by nitrogen adsorption method. 3. a kind of flower thinning agent, is made of the mixed preparation of water insoluble inorganic compound and additive, it is characterized in that, it satisfies the condition of following (g), (h) and (i): (g)0.03≤P≤5 (h) 10≤Q≤200 (i) 1≤Q/P≤150 P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter Q: BET specific surface area (m ² /g) measured by nitrogen adsorption method. 4. The flower thinning agent described in any one of claims 1 to 3 is composed of a mixed preparation of a water-insoluble inorganic compound and an additive, and is characterized in that it satisfies the following (j), (k) and (l )conditions of: (j)0.5≤Dys≤10 (k)0.002≤Dxs≤10 (l) 0.5≤Dys/Dxs≤300 Dys: In the mercury intrusion method, the point at which the increase in mercury intrusion (Log Differential intrusion) reaches the maximum value (ml/g) Dxs: Average pore diameter of Dys Dys/Dxs is the amount of average pore diameter. 5. The flower thinning agent described in any one of claims 1 to 4, wherein the water-insoluble inorganic compound is at least one selected from silicate minerals, calcium carbonate, zeolite, magnesium phosphate, and magnesium carbonate . 6. The flower thinning agent according to any one of claims 1 to 4, wherein the poorly water-soluble inorganic compound is at least one selected from silicate minerals, zeolite, and magnesium phosphate. 7. A flower thinning agent consisting of a mixed preparation of a water-insoluble inorganic compound composed of calcium phosphate and an additive, characterized in that it satisfies the conditions of the following (a), (e), (m) and (n) : (a) 0.03≤P≤30 (e) 3≤Q≤300 (m)0.01≤R≤30 (n)0.5≤S≤300 P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter Q: BET specific surface area measured by nitrogen adsorption method (m ² /g) R: Average particle diameter (μm) of particles measured by electron microscope photography S: porosity S = BET specific surface area Q (m ² /g) measured by nitrogen adsorption method / specific surface area Q1 (m ² /g) calculated from average particle diameter R of particles measured by electron microscope photography. 8. A flower thinning agent, composed of a mixed preparation of a water-insoluble inorganic compound composed of calcium phosphate and an additive, characterized in that it satisfies the conditions of the following (a), (e), (o) and (t) : (a) 0.03≤P≤30 (e) 3≤Q≤300 (o)0.01≤R≤10 (t)0.5≤S≤100 P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter Q: BET specific surface area measured by nitrogen adsorption method (m ² /g) R: Average particle diameter (μm) of particles measured by electron microscope photography S: porosity S = BET specific surface area Q (m ² /g) measured by nitrogen adsorption method / specific surface area Q1 (m ² /g) calculated from average particle diameter R of particles measured by electron microscope photography. 9. A flower thinning agent consisting of a mixed preparation of a water-insoluble inorganic compound composed of calcium phosphate and an additive, characterized in that it satisfies the conditions of the following (a), (e), (u) and (v) : (a) 0.03≤P≤30 (e) 3≤Q≤300 (u)0.01≤R≤5 (v)0.5≤S≤10 P: The average particle diameter (μm) of the particles measured using the SALD-2000A laser particle size distribution meter Q: BET specific surface area measured by nitrogen adsorption method (m ² /g) R: Average particle diameter (μm) of particles measured by electron microscope photography S: porosity S = BET specific surface area Q (m ² /g) measured by nitrogen adsorption method / specific surface area Q1 (m ² /g) calculated from average particle diameter R of particles measured by electron microscope photography. 10. The flower thinning agent according to any one of claims 1 to 9, wherein the additive is at least one selected from condensed phosphoric acid and its salt, lecithin, sterol, amino acid, and sucrose fatty acid ester. 11. The flower thinning agent according to any one of claims 1 to 10, wherein the additive is used in an amount of 0.005 to 200 parts by weight relative to 100 parts by weight of the poorly water-soluble inorganic compound.